# Trigonometry In this topic, we will look at

• Trigonometric Functions
• The Unit Circle
• Trigonometric Identities
• Solving Trigonometric Equations
• Triangle Geometry

• ### Unit CircleSL

The Unit Circle is probably the most important topic to understand from the whole of trigonometry. Lots of the properties of the trigonometric functions can be found from the unit circle. All the work on this page will help us understand all of these prope

• ### Unit Circle HL

The Unit Circle is probably the most important topic to understand from the whole of trigonometry. Lots of the properties of the trigonometric functions can be found from the unit circle. All the work on this page will help us understand all...

• ### Trigonometric Identities

In this page, we will will learn about the Pythagorean Identities and the Double Angle Formulae used in Trigonometry. It is actually quite rare that exam questions are solely about these identities, but it is essential that you can use and manipulate them

• ### Solving Trigonometric Equations

Solving trigonometric equations is a common topic on the examination. The key to solving them is a good knowledge of the trigonometric functions. Whether you prefer to use the Unit Circle or the graphs of the functions, you need to a method that works for

• ### Triangle Geometry

In this page, we will look at the Sine Rule, the Cosine Rule and the formula for the Area of a Triangle. The formula for these three are fairly straight forward to use, but don't take this topic too lightly, sometimes the exam questions can be quite challe